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Objective:To explore the application effect of case-based learning (CBL) and lecture-based learning (LBL) in the teaching of image post-processing course in the standardized training system of medical imaging technology.Methods:A total of 34 trainees in the standardized training of imaging technology of Batch 2018 in West China Hospital of Sichuan University were divided into the experimental group and the control group according to their student numbers, with 17 students in each group. CBL teaching was carried out in the experimental group, and LBL teaching was carried out in the control group. According to the standardized training course design, after one year of image post-processing course teaching, the teaching effect was evaluated through closed-book examination, questionnaire survey and post-processing test. SPSS 20.0 was used for t-test and Mann-Whitney U test. Results:The scores of closed-book examinations (74.42±6.10) and post-processing test (73.47±6.03) in the experimental group were higher than those in the control group [(69.11±3.70) and (69.08±6.51)], and the difference was statistically significant ( P<0.05). The questionnaire survey showed that the students in the experimental group recognized CBL teaching in terms of learning interests stimulation, classroom atmosphere mobilization, clinical thinking cultivation, self-study ability training, and analysis of difficult and rare cases, etc. Conclusion:In the image post-processing course of standardized training of medical imaging technology, the rational application of CBL teaching mode is helpful to improve students' learning enthusiasm, self-learning ability, comprehensive analysis of clinical ability, practical ability, innovation consciousness and so on.
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ABSTRACT This study presents a classifier prediction in groups for the Brazilian Football Championship of both A and B leagues, from the results of the first half of each championship. With assertive predictions of the group where a team will end the championship, strategic planning can be performed in the squad, such as new hiring, specific training for athletes, and possible championships that the team will be entitled to participate in according to the group classification. In order to find the predictions, two techniques of artificial intelligence were applied: Multi-Layer Perceptron (MLP), which is a type of artificial neural network, and Support Vector Machine (SVM). Preliminary results show that the proposed methodology is very promising, with more than 40% successful cases with MLP and almost 50% with SVM. Moreover, results indicate that the methodology is able to make a reasonable prediction by missing one group of the true group at the end of the championship. The SVM technique was slightly better than MLP. A post-processing analysis of the SVM results was applied to the 2018 A league data from the Brazilian championship, resulting in 85% success indicator of groups.
RESUMO Este trabalho apresenta uma previsão de classificação em grupos para as equipes do campeonato brasileiro de futebol tanto da série A quanto da série B a partir dos resultados do primeiro turno de cada campeonato. Com previsões assertivas do grupo onde um time irá finalizar o campeonato, pode-se realizar um planejamento estratégico no elenco tal como novas contratações, treinos específicos dos atletas e possíveis campeonatos que o time terá direito de participar de acordo com o grupo em que se classificar. Para encontrar as previsões, aplicou-se as técnicas rede neural artificial Multi Layer Perceptron (MLP) e Support Vector Machine (SVM). Resultados preliminares indicam que a metodologia proposta é bastante promissora, acertando em mais de 40% dos casos com a MLP e quase 50% com o SVM. Além disso, os resultados indicam que a metodologia também é capaz de realizar uma boa previsão errando em um grupo do verdadeiro grupo ao final do campeonato. A técnica SVM se mostrou um pouco superior à MLP. Um pós processamento nos resultados do SVM é aplicado aos dados do ano de 2018 da série A do campeonato brasileiro, resultando em 85% de acertos dos grupos.
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Optimal performance of pediatric cardiothoracic computed tomography (CT) is technically challenging and may need different approaches for different types of CT scanners. To meet the technical demands and improve clinical standards, a practical, user-friendly, and vendor-specific guideline for pediatric cardiothoracic CT needs to be developed for children with congenital heart disease (CHD). In this article, we have attempted to describe such guideline based on the consensus of experts in the Asian Society of Cardiovascular Imaging CHD Study Group. This first part describes the imaging techniques of pediatric cardiothoracic CT, and it includes recommendations for patient preparation, scan techniques, radiation dose, intravenous injection protocol, post-processing, and vendor-specific protocols.
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Child , Humans , Asian People , Consensus , Heart Defects, Congenital , Injections, IntravenousABSTRACT
This document is the third part of the guidelines for the protocol, the interpretation and post-processing of cardiac magnetic resonance (CMR) studies. These consensus recommendations have been developed by the Consensus Committee of the Korean Society of Cardiovascular Imaging to standardize the requirements for image interpretation and post-processing of CMR. This third part of the recommendations describes tissue characterization modules, including perfusion, late gadolinium enhancement, and T1- and T2 mapping. Additionally, this document provides guidance for visual and quantitative assessment consisting of “What-to-See,” “How-To,” and common pitfalls for the analysis of each module. The Consensus Committee hopes that this document will contribute to the standardization of image interpretation and post-processing of CMR studies.
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Consensus , Gadolinium , Hope , Magnetic Resonance Imaging , PerfusionABSTRACT
Objective To investigate the effect of desflurane post-processing on the expression of glucose transporter 4 (GIUT4)in myocardial ischemia-reperfusion injury.Methods Twenty-four male New Zealand white rabbits were randomly divided into 4 groups (n =6 each):normal control group (group NC),ischemic-reperfusion group (group IR),ischemic-reperfusion postconditioning group (group IRP),desflurane aftertreatment group (group Des).Myocardial ischemia-reperfusion model was established by ligating the left coronary artery.Plasma glucose,Insulin and myocardial glucose uptake rate were measured at the time point before ischemia (T0),30 min after ischemia (T1),30 min (T2),60 min (T3) and 120 min (T4) after reperfusion,for dynamic comparison;the expression of GLUT4 mRNA in myocardium was detected by quantitative RT-PCR,and GLUT4 protein was detected by Western blot.Results Compared with group NC,the levels of blood glucose at T2-T4 increased in group IR (P＜0.05),but blood glucose in group Des was significantly lower than that in groups IR and IRP at T2-T4 (P＜0.05).Compared with group NC,serum insulin levels in groups IR,IRP and Des were significantly higher at T1-T3 (P＜0.05).The level of serum insulin in groups IRP and Des at T1 and T2 was significantly higher than that in group IR (P＜0.05),while that in group Des was higher than that in group IRP (P＜0.05).Blood glucose uptake rate in group IR at T2-T4 was significantly lower than that in groups NC,IRP and Des (P＜0.05),while the blood glucose uptake rate was higher in group Des than that in group IRP (P＜0.05).compared with group NC,the expression of GLUT4 mRNA and protein in groups IR,IRP and Des decreased (P＜0.05),but compared with groups IR and IRP,GLUT4 mRNA and protein expression increased in group Des (P＜0.05).Conclusion Postconditioning of desflurane can improve myocardial ischemia-reperfusion insulin resistance and increase myocardial glucose uptake,which may be related to the increase of myocardial GLUT4 expression.
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Objective To explore coronary CT three-dimensional post-processing standardized display and the construction of digital teaching platform. Methods The conventional display positions of 3D post-processing image were summarized during daily coronary CTA examination, the common place was refined. The construction mode was explored for CTA digital teaching demonstration platform. Results Coronary CTA 3D post-processing standardized display with common and individual property contributed to enhancing the display of coronary images. The CTA digital teaching demonstration platform met the teaching requirements. Conclusion The coronary CT 3D post-processing standardized display and digital teaching platform facilitate the student to master related knowledge.
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Objective To investigate the value of post processing technique of MSCT in the diagnosis of bile duct stones.Methods 89 cases with high density bile stones were collected.All of the images were reconstructed by using surface reconstruction(CPR),multiplanar reconstruction(MPR),volume reconstruction(VR), to clearly show the location, size, number and shape of bile duct stones, and provide accurate image information for clinic.Results 396 cases of bile duct stones were detected in all of the 89 patients,after treatment,the reconstructed image of could accurately show the location,size,number and shape of stones.Conclusion Post-processing technique of MSCT can provide accurate image information for the diagnosis of the the biliary stone,and improve the effectiveness and safety of the operation.
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BACKGROUND AND OBJECTIVES: High-speed videolaryngoscopy (HSV) is the only technique that captures the true intra-cycle vibratory behavior of the vocal folds by capturing full images of the vocal folds. However, it has problems of no immediate feedback during examination, considerable waiting time for digital kymography (DKG), recording duration limited to a few seconds, and extreme demands for storage space. Herein, we demonstrate a new post-processing method that converts HSV images to two-dimensional digital kymography (2D-DKG) images, which adopts the algorithm of 2D videokymography (2D VKG). MATERIALS AND METHODS: HSV system was used to capture images of vocal folds. HSV images were post-processed in Kay image-process software (KIPS), and conventional DKG images were retrieved. Custom-made post-processing system was used to convert HSV images to 2D-DKG images. The quantitative parameters of the post-processed 2D-DKG images was validated by comparing these parameters with those of the DKG images. RESULTS: Serial HSV images for all phases of vocal fold vibratory movement are included. The images were converted by the scanning method using U-medical image-process software. Similar to conventional DKG, post-processed 2D DKG image from the HSV image can provide quantitative information on vocal fold mucosa vibration, including the various vibratory phases. Differences in amplitude symmetry index, phase symmetry index, open quotient, and close quotient between 2D-DKG and DKG were analyzed. There were no statistical differences between the quantitative parameters of vocal fold vibratory movement in 2D-DKG and DKG. CONCLUSION: The post-processing method of converting HSV images to 2D DKG images could provide clinical information and storage economy.
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Kymography , Methods , Mucous Membrane , Vibration , Vocal Cords , VoiceABSTRACT
Objective To investigate the diagnostic value of multislice spiral CT (MSCT)in ureteral polyps by multi-phase enhanced scan. Methods Seven cases of ureteral polyps confirmed by operation and pathology were retrospectively analyzed,including 5 fibro-epithelial polyps and 2 inflammatory polyps.All of the patients underwent MSCT multi-phase enhanced scan.Thin slice reconstruction,three-dimensional post processing including maximum intensity projection (MIP),multi planar reconstruction (MPR)and volume reconstruction (VR) were performed for each phase data.Results The fibro-epithelial polyps were more common in the young men.Their longitudinal diameters were significantly greater than the transverse diameters.The shapes were cordal,papillary,or columnar.They were not enhanced obviously in the arterial phase,however,enhanced obviously in the delayed phase.Inflammatory polyps were more common in adults and all of them were accompanied with stones.Their longitudinal diameters were slightly greater than the transverse diameters,and the shape was spindle.The margins were unclear with cord changes.The upper and lower ureters showed extensive thickening of the wall.These polyps were significantly enhanced in the arterial phase and further strengthened in the delayed phase.Conclusion The morphology and dynamic enhancement characteristics of ureteral polyps can be displayed and clearly diagnosed by MSCT.
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[Abstract ] Objective The purpose of this study was to observe the effects of dl-3n-butylphthalide (NBP) sodium chloride injection post-processing on the expressions of X-inhibitor of apoptosis (XIAP) and Bcl-2/adenovirus E1B19kDa interacting protein 3 (BNIP3) in the hippocampus CA1 neurons of focal cerebral ischemia reperfusion (IR) rats, and to investigate the brain-protection mechanisms of NBP. Methods A total of65 adult male Sprague-Dawley rats were divided into five groups of equal number, sham op-eration, IR, and low-,medium -and high-dose NBP, according to the random number table. The IR models were established by modified ligation of the middle cerebral artery.The animals in the NBP groups received intra-abdominal injection of NBP at 2, 4, and 6 mg/kg, re-spectively.All the rats were sacrificed at 24 hours after modeling,neurological scores obtained by Zea Longa, the volume of infarction measured by TTC staining, the number of apoptotic cells counted by TUNEL, and the expressions of XIAP and BNIP3 detected by immunohistochemistry and real-time PCR. Results The neural function defect scores were markedly lower in low-, medium-and high-dose NBP groups than in IR model rats (P<0.05), with statis-tically significant differences among the three dose groups (P<0.05).The volume of infarction was remarkably higher in the low-dose than in the medium-and high-dose NBP groups (P<0.05).The number of apoptotic cells in the hippocampus CA1 neurons was de-creased in the NBP groups as compared with the IR models (P<0.05).The XIAP-and BNIP3-positive cells were significantly in-creased in the IR model rats as compared with the sham operation group ([22.31 ±0.94] and [60.13 ±2.59]/HP vs [3.07 ±1.43] and [5.78 ±0.44]/HP, P<0.05).In comparison with the IR models, the NBP-treated rats showed a progressively increased number of XIAP-positive cells in low-, medium-, and high-dose groups ([28.70 ±1.18], [32.79 ±0.88], and [37.01 ±1.24]/HP) (P<0.05) but a decreased number of BNIP3-positive cells in the three dose groups ([52.07 ±1.02], [40.30 ±2.00], and [31.04 ± 0.43]/HP) (P<0.05).Similarly, the expression of XIAP mRNA was up-regulated while that of BNIP3 mRNA down-regulated in the NBP treatment groups as compared with the IR model rats, both in a dose-dependent manner (P<0.05). Conclusion NBP post-processing has a neuroprotective effect on IR rats, which is associated with its impact on the expressions of XIAP and BNIP3.
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Objective To probe the application and values of multilayer spiral CT three -dimensional recon-struction of post-processing in the diagnosis of bone tumor images .Methods 54 bone tumor patients in our hospital from August 2013 to August 2014 were taken as research objects and they were randomly into two groups with same members.Patients in observation group were conducted with multilayer spiral CT three -dimensional reconstruction diagnosis while patients in control group were conducted with MRI diagnosis .The diagnosis Results were analyzed . Result Diagnosis effective rate in observation group was 85.2%, with 59.3%in control group.Differences were evi-dent ( p<0.05) and had statistical significance .Conclusion Applying multilayer spiral CT three -dimensional re-construction of post-processing in diagnosis of bone tumor can improve diagnosis accuracy rate , and correctly judge disease extents , which can provide effective gist for clinical treatment .
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Objective To explore the effect of multi-detector computed tomography (MDCT)scan parameters and imaging post-processing methods on metallic artifacts,so as to achieve the perfection in reduction of artifacts caused by metallic implants.Methods Water phantom with titanium alloy steel plate was scanned under MDCT with alternating scan parameters including tube voltage, tube current,pitch and focal spot.The areas of image artifacts were measured and correlated with the scan parameters.Another 1 5 postoperative patients with vertebral implantation scaned with the conventional scan parameters were also included in the study.Ima-ging post-processing including multi-planar reconstruction (MPR),window width and level adjustment,and volume rendering tech-nique (VRT)was performed by using optimized and conventional methods,respectively,and then the image quality was evaluated. Results The areas of image artifacts under the differnt tube voltage,pitch,and focal spot were statistically different.With the in-crease of the tube voltage or the decrease of the pitch,the area of image artifacts decreased gradually.The area of image artifacts scanned with the small focal spot was smaller than the large one.There was no significant difference for the area of image artifacts scanned with the different tube currents.The metallic artifacts decreased by using the soft tissue algorithm (Kernel B40f)in the bone window reconstruction,wide windows (2 000 HU window width,600 HU window level)in observing,and VRT.Conclusion Selection of appropriate MDCT scan parameters and imaging post-processing methods can reduce the metal artifacts,improve the image quality and diagnosis.
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Objective To study clinical application value of 128-slice spiral CT imaging post-processing technique in knee joint trauma.Methods 75 cases of knee traumatic patients were examined by ordinary X-ray and 128-slice spiral CT imaging post-process-ing technique,and retrospectively analysed.Results For 75 cases of knee trauma patients,on X-ray examination 64 cases of fracture patients(78 fractures),6 patients of possible fractures,5 cases of missed diagnosis and misdiagnosis in were found,the detection rate was 88.6%;all patients underwent 128-slice spiral CT imaging post-processing technique-MPR/VR,and definite diagnosis of knee joint bone fracture was found in 75 cases (88 fractures),the detection rate was 100.0%,which was significantly higher than that on the X-ray examination (χ2 =6.1 1 7 2,P <0.05).The MPR reconstruction of knee joint fracture is of the highest detection rate.Con-clusion MSCT imaging post-processing technique can directly,clearly and comprehensive display knee joint trauma cases,and help doctors understand the relationship between fractures,soft tissue and joint space,in order to develop accurate and reasonable clinical treatment plan.
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Objective To explore the imaging appearances and the value of multi-slice CT (MSCT)with post-processing tech-niques in diagnosis and treatment of lumbar hernia (LH).Methods The imaging and clinical data of 1 6 patients with LH which were confirmed by surgery were analyzed retrospectively.Results In 1 6 patients,1 7 lesions of LH were revealed by MSCT.There were superior lumbar hernias in 13 (76.5%),inferior lumbar hernias in 3 (1 7.6%)and diffuse lumbar hernia in 1 (5.9%).Hernia ring in diameter ranged from 1.5 to 9.3 cm,and the hernia sac size ranged from 1.8 cm×2.4 cm to 1 1.3 cm× 6.2 cm.MSCT showed oval or flask shaped mass of extraperitioneal fat with or without peritoneum and visceral contents protruded through the de-fecting fascia floor into lumbar triangle.Superior lumbar hernia was bounded by the 12th rib superiorly,the erector spine muscle medially and the internal oblique muscle laterally.Inferior lumbar hernia was bounded by latissimus dorsi muscle medially,the ex-ternal oblique muscle laterally and the iliac crest inferiorly.Hernia contents included colon in 3 patients and small bowel in 2 with in-carcerated hernia with small bowel obstruction in 1,and adipose tissue and mesentery in other 12.All patients received surgery treatment,and the appropriate surgical methods were selected according to the MSCT findings.The surgical findings were consistent with MSCT results.No recurrence was found during follow-up.Conclusion LH has characteristic CT manifestations.MSCT volu-metric scanning with post-processing techniques can clearly display the type of LH,the size of abdominal wall defect,hernia contents and their complications.It is helpful for diagnosis of the LH and differentiation from other diseases,which may provide important information for clinical surgery.
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Objective To investigate the difference of colon length between patients with intractable constipation and normal peo-ple.Methods 40 patients with intractable constipation and 35 cases of normal control group received air enema CT scan,post-pro-cessing techniques-curved planar reformation and volume rendering were used to measure the length of colon.Results Colon length of normal people and constipation patients were (1 230±33)mm and (1 605±47)mm,respectively.There was significant difference between normal people and constipation patients (t=163,P=0.015).Conclusion CT air enema technique can be used to measure the length of colon obj ectively for diagnosing and treating redundant colon.
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Intramural esophageal dissection (IED) is an uncommon disorder characterized by separation of the mucosal and submucosal layers of the esophagus. Iatrogenic intervention is the most common cause of IED, but spontaneous dissection is rare. We report an unusually complicated case of spontaneous IED that involved the full-length of the esophagus that necessitated surgical intervention due to infection of the false lumen. In this case, chest computed tomography successfully established the diagnosis and aided in pre-operative evaluation with the use of various image post-processing techniques.
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Humans , Male , Middle Aged , Esophageal Diseases/diagnostic imaging , Esophagoscopy/methods , Esophagus/injuries , Multidetector Computed Tomography , Rare Diseases/diagnostic imaging , Rupture, Spontaneous/diagnostic imagingABSTRACT
OBJECTIVE: To compare new full-field digital mammography (FFDM) with and without use of an advanced post-processing algorithm to improve image quality, lesion detection, diagnostic performance, and priority rank. MATERIALS AND METHODS: During a 22-month period, we prospectively enrolled 100 cases of specimen FFDM mammography (Brestige(R)), which was performed alone or in combination with a post-processing algorithm developed by the manufacturer: group A (SMA), specimen mammography without application of "Mammogram enhancement ver. 2.0"; group B (SMB), specimen mammography with application of "Mammogram enhancement ver. 2.0". Two sets of specimen mammographies were randomly reviewed by five experienced radiologists. Image quality, lesion detection, diagnostic performance, and priority rank with regard to image preference were evaluated. RESULTS: Three aspects of image quality (overall quality, contrast, and noise) of the SMB were significantly superior to those of SMA (p < 0.05). SMB was significantly superior to SMA for visualizing calcifications (p < 0.05). Diagnostic performance, as evaluated by cancer score, was similar between SMA and SMB. SMB was preferred to SMA by four of the five reviewers. CONCLUSION: The post-processing algorithm may improve image quality with better image preference in FFDM than without use of the software.
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Adult , Aged , Female , Humans , Middle Aged , Algorithms , Breast Neoplasms/diagnostic imaging , Calcinosis/diagnostic imaging , Mammography/methods , Prospective Studies , Radiographic Image Enhancement/methods , Sensitivity and Specificity , SoftwareABSTRACT
Objective To evaluate the diagnostic value of 64-slice VCT reconstruction techniques in the diseases of joints of foot and hand.Methods 50 patients with diseases of joints of foot and hand underwent MSCT scans,the data were reconstructed,including multiplanar reconstruction(MPR),maximum intensity projection(MIP),shaded surface display(SSD)and volume rendering(VR),the results were analysed.Results 33 patients with fractures,40 and 51 fractures were found by X-ray and MPR,VR,respectively.The joint surface involved in 7 fractures,which was best with VR and MPR to show the whole fractures.SSD was better to demonstrate the soft tissue and the vessels of the skin.3D bone reconstruction with MIP was better than plain film in showing the fractures in 4 patients with plaster external fixation.Conclusion 64-slice VCT reconstruction techniques are effective in diagnosis of the diseases of joints of foot and hand.
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Objective In order to provide a more realistic microvasculature model for the study on tumor hemodynamics and drug delivery, a simulated tumor microvascular network was developed by the technique of numerical simulation and post processing. Method We constructed a tumor microvascular model with host arteriole venule system, in which the variation in vascular branching and dimensions was taken into account. A sensitivity analysis was made for the parameters of the model to evaluate the adjustability of simulated results. The connectivity of the vascular network was tested to ensure the integrity of the network. The vascular network was smoothed afterwards to reduce flow resistance resulting from numerical networks. Results The simulated results are consistent with the characteristics of real tumor microvasculature, which show intact circulation, local adjustability, high network connectivity and smooth degree. Conclusions This study provid a numerical microvasculature model for the research on tumor hemodynamics, drug delivery and vascular targeted therapy.
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Objective To explore the improvement effect of SLOT Scan technology (narrow seam exposure capture technology) and the radiography techniques on the quality of the scoliosis X-ray films in teenagers. Methods The Sonialvision Satire Ⅱ equipment of Shimadzu corporation and SLOT Scan were applied to take the radiography for 60 patients taller than 1.50 metres. All the data were collected through a continual exposure, and the images were sewn up through a seamless connec-tion software. Results Cervical, thoracic, and lumbar and sacral segments could clearly present at the same time on one X-ray film by seamless splicing, and the quality of one time radiograph was as good as one film. Conclusion As a new radiology technique, SLOT Scan can wipe off splitting arti-fact effectively and make the whole spine seamless present on one X-ray film. It helps the spinal sur-geons to observe, calculate and measure accurately. It is useful to choose the operation mode and judge the curative effect.